A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5855-01-203-4719
NSN 6240-01-210-8467
NSN 5855-01-632-5021
NSN 5910-00-869-9069
NSN 5960-01-340-4487
NSN 5930-01-020-7715
NSN 6130-00-566-0347
NSN 5855-00-106-1640
NSN 5910-01-396-2759
NSN 5925-01-288-0025
NSN 4140-01-481-9191
NSN 5910-01-480-3729